March 21 is generally a great time to visit Bangkok. While there is a slight chance of rain (19%), showers are usually brief. Expect comfortable 34°C weather. Expect a bustling atmosphere in Bangkok right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Bangkok
Currency
THB
฿ Thai baht
Language
Thai
Driving
Left side
Connect
Prepaid SIM cards for tourists are readi...
Safety
Moderate Safety
GPI: 2.098
Bangkok Weather Forecast for March 21
"Warm & Sunny. Expect average highs of 33.7°C. 19% chance of rain."
What to Wear in Bangkok in March
Based on historical data for March 21, Bangkok typically experiences temperatures between 25.8°C and 33.7°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (19% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Bangkok
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
33.7°C
Daytime Peak
Average Low
25.8°C
Nighttime Low
Feels Like
46.2°C
🔥 Heat index effect
Rain Chance
19%
Avg 1mm if it rains
Cloud Cover
49%
Overcast
Pressure
1009.4 hPa
Low volatility
Bangkok Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 99% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
27.7°C
Humid/Sticky
Heat Index
46.2°C
Feels hotter
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Thailand
Flight Traffic
High
97/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~540
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Bangkok
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:23
☀️ Noon
12:26
🌇 Sunset
18:30
⏱️ Daylight
12h 6m
Wind Speed
16.6 km/h
Gentle breeze
Sunshine
10.4 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Bangkok
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Bangkok
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Unhealthy for sensitive groups. Consider wearing a mask outdoors.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Bangkok on March 21 averages 33.7°C with a 19% precipitation probability. Wedding/Outdoor Event Score: 91/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Bangkok Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
March 15
33.5°C • 14% rain
Score
98
March 16
33.6°C • 14% rain
Score
98
March 17
33.6°C • 15% rain
Score
98
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (March 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Bangkok Worth Visiting on March 21?
Planning a trip to Bangkok on March 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 33.7°C with a 19% historical precipitation risk.
✈️ Travel Logistics: Approximately 540 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 11 vaccinations are recommended for Thailand, including COVID-19.
📊 Historical Extremes: The hottest March 21 recorded in the last 30 years saw temperatures hit 35°C in 2016, while the coldest dropped to 22.7°C in 2025.